We know there’s a lot of links here so far but just a couple more: [Henry] took some shots of the kart chassis before adding the motor, and just for fun, take a look at his scotch tape dispenser. When you’re done clicking on those join us after the break for some test drive footage.

“As for the maximum current that the motor can take, this is governed by the resistance of its coils and brushes inside. Going back to an ideal motor, this would have zero resistance. When this ideal motor is stalled, it will take an infinite current, which will produce an infinite torque, and push whatever blockage is out of the way. In a real motor, the torque it can produce is not infinite, it is limited by the maximum current that can flow through the motor.” – “Using DC motors in fighting robots – http://homepages.which.net/~paul.hills/Motors/MotorsBody.html“